Hand-guided electrically-powered tool with handle

ABSTRACT

A hand-guided and operated electrically-powered hand tool, in particular a belt sander or the like, is comprised of a working tool part ( 2 ) projecting from a housing for the working of a workpiece. The housing ( 1 ) has on the side facing away from the working tool part ( 2 ) a handle ( 4 ) for guiding the tool. Planar surfaces on bearing surfaces ( 5 ) arranged on the handle provide for stable bearing of the electrically-powered hand tool in a change position. In the change-position, there is no contact between the working tool part and the workpiece, so that uncomplicated replacement of the tool part is possible.

BACKGROUND OF THE INVENTION

[0001] The invention relates to a hand-guided and operatedelectrically-powered tool, in particular a belt sander or the like, witha tool extending from a housing for working a workpiece, whereby thehousing has at least one handle on the side of the housing opposite theworkpiece.

[0002] Hand-guided electrically-powered tools of the above type are usedespecially for small jobs. By virtue of a compact construction, thistype of electrically powered tool is easy to transport and is versatilein its applications. On the one hand, the housing provides forprotection and on the other hand provides for enhanced ease in thehandling of the electrically-powered tool. A motor-driven tool projectsfrom the housing and thus allows the user to work on a workpiece, forexample a wooden board. The handle is provided for guiding theelectrically-powered tool, especially the tool part itself. Said handleis arranged on the housing, on the side opposite the working toolitself. In this fashion, it is possible for the operator to guide theelectrically-powered hand tool easily and safely. Furthermore, thehandle facilitates application of pressure by the operator on the tooland so, for example, to control or to interrupt the work process. Inaddition, the handle facilitates positioning of the electrically-poweredhand tool by the operator.

[0003] The disadvantage in known electrically-powered hand tools is thefact that the electrically-powered hand tool must be held by theoperator with at least one hand when changing the working tool part.Frequently, however, both hands are needed when manipulating theelectrically-powered hand tool, for example, in order to change theworking tool part. In such cases, the operator must make use of specialaccessory means such as, for example, special bases or supports.

SUMMARY OF THE INVENTION

[0004] The object of the present invention is to provide a hand-guidedelectrically-powered hand tool that facilitates the manipulation of amounted working tool part.

[0005] According to the invention, the object is achieved in that thehandle has at least one essentially planar support surface for a stablebearing of the electrically-powered hand tool in a position thatexcludes contact of the tool part with the workpiece.

[0006] By virtue of the fact that the handle has at least one planarsupport surface upon which the hand tool is supported, the operator isprovided with the opportunity of easy access to the working tool part,without the use of accessory means. The stable bearing is particularlyimportant in order to prevent the electrically-powered hand tool fromtipping out of its position. In order to provide problem-freemanipulation of the working tool part, for example, tool exchange oradjustment of same, there is no contact in the support position betweenthe working tool part and the workpiece.

[0007] Preferably, the handle has a plurality of bearing surfaces, allof which are arranged in the same plane, in order to assure the securebearing of the electrically-powered hand toll even in the case of largermagnitude external forces. Furthermore, in this fashion the securebearing of the hand tool is also provided in the case of theelectrically-powered hand tool from which the tool part has beenremoved. In contrast with a single bearing surface, the preferredembodiment provides the advantage, in that the shape of the housing, inparticular the handle, is less restricted. In the case of only onebearing, the gravity vector running through the center of gravity of theelectrically-powered hand toll borne in such position must assure astable bearing.

[0008] Advantageously, the handle has two bearing surfaces. In thisfashion, a secure bearing and compact construction of the housing ismade possible. If the working tool part should represent a relativelyhigh proportion of the weight of the overall weight, then the handle isadvantageously provided with three bearing surfaces.

[0009] In the preferred fashion, the bearing surfaces are arrangedessentially parallel to the working surface of the tool part in order toachieve optimum weight distribution and thus a stable bearing of theelectrically-powered hand tool in its position. Moreover, in suchposition the operator is provided with optimal access to the tool part.

[0010] Advantageously, the handle is at least partly comprised of anelastic material so that on the one hand the electrically-powered handtool in such position does not slip and on the other hand minorirregularities in the surface are evened out by the bearing surface.

[0011] The handle is preferably at least partly made of rubber in orderto assure that the electrically-powered hand tool can be manufacturedeconomically.

BRIEF DESCRIPTION OF THE DRAWING

[0012] The invention is more fully explained below using an illustrativeembodiment. The drawing shows that:

[0013]FIG. 1 is a side view of an electrically-powered hand toolaccording to the invention in a working position; and

[0014]FIG. 2 is similar to FIG. 1 with the electrically-powered handtool inverted and supported upon a bearing surface.

DETAILED DESCRIPTION OF THE INVENTION

[0015] In FIGS. 1 and 2 a manually guided and operatedelectrically-powered hand tool, in particular a belt sander,accordingly, the invention is illustrated and includes a working toolpart 2 projecting from a housing 1 for working of a workpiece 6. Forguiding the belt sander, the housing 1 has, arranged on the sideopposite working tool part 2, a handle 4. The working tool part 2, inparticular abrasive paper, is removably fastened by means of clips 7 toa motor-driven vibrating plate 8.

[0016] The handle 4 comprises a switch element 9 for switching on andswitching off a motor (not shown in the figures). In a working position,as illustrated in FIG. 1, the tool is in contact with a surface 10 ofthe workpiece 6 that is to be worked

[0017] The handle 4 has two bearing surfaces 5 on the side opposite tothat of the working tool part. The two bearing surfaces 5 are arrangedessentially in the same plane E, whereby the inventive belt sander canbe stably supported in a position in which the tool part 2 is not incontact with the surface 10 of the workpiece 6, as can be seenparticularly in FIG. 2. In such position, the operator can operate thetwo clips 7, for example, to replace the working tool part 2, inparticular the abrasive paper. In order to even out any eventualunevenness in the support plane E, the handle is comprised partly of anelastic material, in particular rubber.

What is claimed is:
 1. A manually operated electrically-powered handtool, such as a belt sander and the like, comprising a housing (1) witha first surface for mounting a working tool part (2) having a workingsurface for operating on a workpiece and a second surface directlyopposite said working surface, at least one handle (4) on said secondsurface, said handle has at least one substantially planar bearingsurface for stably supporting said hand tool with said working surfaceof said work tool part (2) out of contact with the workpiece.
 2. Amanually operated electrically-powered hand tool, as set forth in claim1, wherein the said handle (4) has a plurality of bearing surfaces (5),with all of said bearing surfaces located in the same plane.
 3. Amanually operated electrically-powered hand tool, as set forth in claim2, wherein said handle (4) has two bearing surfaces (5).
 4. A manuallyoperated electrically-powered hand tool, as set forth in claim 2,wherein said bearing surfaces (5) are arranged substantially parallel tothe working surface of said working tool part (2).
 5. A manuallyoperated electrically-powered hand tool, as set forth in claim 1,wherein said handle (4) is comprised at least in part of an elasticmaterial.
 6. A manually operated electrically-powered hand tool, as setforth in claim 5, wherein said handle (4) is comprised at least in partof rubber.